Dell Alienware M15x (Early 2011) - Manual (Page 22)

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CHAPTER 5: MEMORY MODULE(S)
CAUTION: To prevent damage to the memory module connector(s), do
not use tools to spread the memory module spring-locks.
Use your fingertips to carefully spread apart the spring-locks on the 6.
memory-module connector until the memory module pops up.
Remove the memory module. 7.
1
2
4
5
3
1 memory module 3 memory-module connector
2 spring-locks (2)